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4rdu

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Crystal structure of a distal-less homeobox protein 5 (Dlx5) from Homo sapiens at 1.85 A resolution

Structural highlights

4rdu is a 6 chain structure with sequence from Homo sapiens and Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.85Å
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

DLX5_HUMAN Defects in DLX5 are the cause of split-hand/foot malformation type 1, with sensorineural hearing loss (SHFM1D) [MIM:220600. A disease characterized by the association of split-hand/foot malformation with deafness. Split-hand/foot malformation is a limb malformation involving the central rays of the autopod and presenting with syndactyly, median clefts of the hands and feet, and aplasia and/or hypoplasia of the phalanges, metacarpals, and metatarsals. Some patients have been found to have mental retardation, ectodermal and craniofacial findings, and orofacial clefting.^[1]

Function

DLX5_HUMAN Transcriptional factor involved in bone development. Acts as an immediate early BMP-responsive transcriptional activator essential for osteoblast differentiation. Stimulates ALPL promoter activity in a RUNX2-independent manner during osteoblast differentiation. Stimulates SP7 promoter activity during osteoblast differentiation. Promotes cell proliferation by up-regulating MYC promoter activity. Involved as a positive regulator of both chondrogenesis and chondrocyte hypertrophy in the endochondral skeleton. Binds to the homeodomain-response element of the ALPL and SP7 promoter. Binds to the MYC promoter. Requires the 5'-TAATTA-3' consensus sequence for DNA-binding.^[2]

References

↑ Shamseldin HE, Faden MA, Alashram W, Alkuraya FS. Identification of a novel DLX5 mutation in a family with autosomal recessive split hand and foot malformation. J Med Genet. 2012 Jan;49(1):16-20. doi: 10.1136/jmedgenet-2011-100556. Epub 2011 , Nov 25. PMID:22121204 doi:10.1136/jmedgenet-2011-100556
↑ Xu J, Testa JR. DLX5 (distal-less homeobox 5) promotes tumor cell proliferation by transcriptionally regulating MYC. J Biol Chem. 2009 Jul 31;284(31):20593-601. doi: 10.1074/jbc.M109.021477. Epub, 2009 Jun 4. PMID:19497851 doi:10.1074/jbc.M109.021477